3449515

Information

• Patent Grant
• 3449515

• References
• Source

• Patent Number

  3,449,515

• Date Filed

  Not available

• Date Issued

  Tuesday, June 10, 1969
  55 years ago

• CPC

  • H04L25/0268 - with modulation and subsequent demodulation
  • H04L12/02 - Details
  • H04L13/186 - Page printing; tabulating

• US Classifications

  • 178 - Telegraphy